GitLab

* switch conditional checks to `self.backend`

* nit

* nit

* commit feedback

* fix test; update precommit hooks

* add escape hatch for custom self.AUTO_MODEL_CLASS

* add escape hatch for custom self.AUTO_MODEL_CLASS

* fix

* move assertion

* add logging messages

* update AUTO_MODEL_CLASS behavior in _get_backend

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Co-authored-by: haileyschoelkopf <hailey@eleuther.ai>